Composition metal.



UNITED STATES PATENT OFFICE.

JAMES NAULTY AND JOHN SCANLIN, OF PHILADELPHIA, PENNSYLVANIA.

COMPOSITION METAL.

No Drawing.

T 0 all whom it may concern:

Be it known that we, JAMES NAULTY and JOHN SOANLIN, citizens of theUnited States. residing at Philadelphia, in the county of Philadelphiaand State of Pennsylvania, have invented a certain new and usefulImprovement in Composition Metals, of which the following is aspecification.

Our invention relates to a new and useful improvement in compositionmetals, and has for its object to combine chromium with co per or itsalloys to produce a metal which wi 1 be approximately as hard as steel,thereby permitting edged tools to be made therefrom, and adaptlng themetal for rolling hot or cold welding and forge work.

In accomplishing the above named object, we mix the chromium with thecopper in approximately the ratio of one to nine, having found that thisgives the most satisfactory results, and this ratio is maintainedwhether the copper be in pure state or in a composition, making analloy.

In-detail our rocess is as follows: The copper or any of its alloys isheated to a suitable temperature and may be subjected to the action ofthe chromium in about the proportion of nine to one. Where the alloys ofcopper have the chromium mixed Specification of Letters Patent.

Application filed January 4, 1910.

Patented May 24, 1910.

Serial No. 536,360.

therewith the most satisfactory results are obtained by first meltingthe copper, then adding the chromium, and then the other ingredients toform the alloy desired, as for instance, in adding the chromium withother metals the co per is first melted and the amount is equa to aboutforty-five per cent. of the whole. To this is added five per cent.chromium, with this is mixed twenty-five per cent. nickel, and then isadded twenty-five per cent. zinc.

Of course we do not wish to be limited to the exact details ofconstruction as these may be varied within the limits of the appendedclaim without departing from the spirit of our invention.

Having thus fully described our invention, what we claim as new anduseful, is-

A composition of metals comprising fifty per cent. copper and chromiumin ratio of nine to one combined with other metals.

In testimony whereof, we have hereunto affixed our signatures in thepresence of two subscribing Witnesses.

JAS. NAULTY. JOHN SGANLIN. Witnesses:

PRICE I. PA'I'ION, S. M. GALLAGHER.

